US5137991A
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Polyaniline compositions, processes for their preparation and uses thereof
Assignee: OHIO STATE UNIVERSITY RESEARCH FOUNDATION COLUMBUS OH
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Filing: 1989-10-19
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Granted: 1992-08-11
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Expires: 2009-10-19
Abstract
Abstract Self-prontonated sulfonic acid-substituted polyaniline compositions, processes for their preparation and uses therefor are disclosed. The sulfonated polyaniline compositions have faster electronic and optical responses to electrochemical potentials comparing to its parent polyaniline, improved environmental stability, and improved solubility than the parent polymer, polyaniline. A process for producing the sulfonated polyaniline compositions comprises reacting the polyaniline polymer with concentrated sulfuric acid. The sulfonated polyaniline compositions are useful for switching an electrochemical response between a conducting and a nonconducting state. The sulfonated polyaniline compositions are also useful for conduction of electricity, absorption of electromagnetic radiation, modulation of electromagnetic beams and modification of the electromagnetic response of sulfonated polyaniline compositions by chemical or electrochemical means. The sulfonated polyaniline compositions are also useful as a high density erasable data storage medium for use in information storage and processing applications. The invention further provides electronic, chemical, electrochemical, and optical microelectronic devices which use and control the chemical and physical properties of the sulfonated polyaniline compositions.
Inventors
- 👤 Arthur J. Epstein
- 👤 Jiang Yue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:08
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/60; C; C08; C08G; C08G73/00; C08G73/02; C08G73/026; C08G73/0266; D; D01; D01F; D01F6/00; D01F6/58; D01F6/76; D06; D06M; D06M10/00; D06M10/04; D06M10/08; D06M10/10; D06M15/00; D06M15/19; D06M15/37; D06M15/61; G; G02; G02F; G02F1/00; G02F1/01; G02F1/0126; G02F1/35; G02F1/355; G02F1/361; G02F1/3611; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/128; G11B7/252; G11B7/253; G11B7/2531; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
171 words
A sulfonated polyaniline composition having a chemical composition of formula I ##STR8## wherein O≦y≦1, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of H, SO 3 - , --SO 3 H, --R 7 SO 3 - , --R 7 SO 3 H, --OCH 3 , --CH 3 , --C 2 H 5 , --F, --Cl, --Br, --I, --NR 7 2, --NHCOR 7 , --OH, --O - , --SR 7 , --OR 7 , --OCOR 7 , --NO 2 , --COOH, --COOR 7 , --COR 7 , --CHO and --CN, wherein R 7 is a C 1 -C 8 alkyl, aryl or aralkyl group, and wherein the fraction of rings containing at least one R 1 , R 2 , R 3 or R 4 group being an --SO 3 - , --SO 3 H, --R 7 SO 3 - , or --R 7 SO 3 H varies from approximately 20 percent to one hundred percent.
Claim 2
Dependent Claim
171 words
A sulfonated polyaniline composition having a chemical composition of formula I ##STR8## wherein O≦y≦1, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of H, SO 3 - , --SO 3 H, --R 7 SO 3 - , --R 7 SO 3 H, --OCH 3 , --CH 3 , --C 2 H 5 , --F, --Cl, --Br, --I, --NR 7 2, --NHCOR 7 , --OH, --O - , --SR 7 , --OR 7 , --OCOR 7 , --NO 2 , --COOH, --COOR 7 , --COR 7 , --CHO and --CN, wherein R 7 is a C 1 -C 8 alkyl, aryl or aralkyl group, and wherein the fraction of rings containing at least one R 1 , R 2 , R 3 or R 4 group being an --SO 3 - , --SO 3 H, --R 7 SO 3 - , or --R 7 SO 3 H varies from approximately 20 percent to one hundred percent.
Claim 3
Dependent Claim
32 words
The composition as claimed in claim 1, wherein the sulfonated polyaniline composition is of molecular weight in the range of from approximately 300 (oligomers of sulfonated polyaniline) to in excess of 100,000.
Claim 4
Dependent Claim
46 words
The composition as claimed in claim 1, wherein R 1 is selected from the group consisting of --SO 3 - , --SO 3 H, --R 7 SO 3 - , and --R 7 SO 3 H and R 2 =R 3 =R 4 =H and y˜0.5.
Claim 5
Dependent Claim
21 words
A process for producing the polyaniline composition of claim 1 comprising reacting a polyaniline polymer and H 2 SO 4 .
Claim 6
Dependent Claim
24 words
The process according to claim 4 in which the reaction is conducted at a temperature range of between about -38° C. and 100° C.
Claim 7
Dependent Claim
15 words
The process according to claim 4 in which the reaction is carried out in air.
Claim 8
Dependent Claim
25 words
The process according to claim 4 in which the polyaniline polymer has a predetermined chain length which is not reduced in length during the reaction.
Claim 9
Dependent Claim
23 words
The process according to claim 4 in which a copolymer of polyaniline and sulfonated polyaniline is obtained by partially sulfonating the polyaniline polymer.
Claim 10
Dependent Claim
23 words
The process according to claim 8 in which the partial sulfonation of the polyaniline polymer comprises shortening sulfonation times and/or lowering sulfonation temperatures.
Claim 11
Dependent Claim
41 words
A composition for switching an electrochemical response between a conducting and a nonconducting state, wherein the electrochemical response is in the range of about -0.2 to about 0.8 V, wherein the composition comprises a sulfonated polyaniline composition of the formula I.
Claim 12
Dependent Claim
41 words
A composition for switching an electrochemical response between a conducting and a nonconducting state, wherein the electrochemical response is in the range of about -0.2 to about 0.8 V, wherein the composition comprises a sulfonated polyaniline composition of the formula I.
Claim 13
Dependent Claim
16 words
The composition as claimed in claim 1, wherein the composition is used in an electrochromic display.
Claim 14
Dependent Claim
16 words
The composition as claimed in claim 10, wherein the composition is used in an electronic switch.
Claim 15
Dependent Claim
16 words
The composition as claimed in claim 10, wherein the composition is used in a rechargeable battery.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-11 | 1996-02-10 | 1996-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-11 | 2000-02-10 | 2000-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-11 | 2004-02-10 | 2004-08-11 | $7700.00 | Window Closed / Lapsed |